Input voltage offset calibration of an analog device using a microcontroller
US6515464B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Dec 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Input offset voltage calibration of an analog device, or plurality of analog devices, is controlled by a microcontroller. The microcontroller and analog device(s) are fabricated on an integrated circuit die or in a multi-chip package. The microcontroller applies a digital word to an input offset voltage compensation circuit of the analog device for generating input offset voltage compensation. The analog device is switched to a calibrate mode and a voltage comparator compares the output of the analog input device and a voltage reference. When the output of the analog input device is equal to or greater than the voltage reference, the comparator output signals the microcontroller by changing its output logic level. The input offset voltage compensation circuit of the analog input device has a storage register or memory that retains the digital word which compensates for the input offset voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.